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,@VED tant getest @ffies Letters Patent No. 75,599, dated Zlm'cL I7, 1868.

METHOD. 0I' HANGING SIEVES AND SCREEN S.

@its tlgrhule maar tu is tipa trttns ijatnit mit mating put at tige time 'EO-ALL IVI-IOM IT MAY OONCERN:

Be it known Ithat'I, SAMUEL THOMPSON, of BaUston Spa, in the county of Saratoga, and State of New York, have invented a new and improved Agitating Motion; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which-l Figurc 1 is a transverse vertical sectionpf a screen or riddle Figure a plan view' ofthe screen.-

Figure E is a detail View of the eye and pin ofthe rod modification.

'Similar letters` of referenceindicate corresponding parts. p

This invention relates to the production cfa certain violent agita purposes, as the screening of salt, where the riddle or screen Afre l which it is especially liable when the salt is green or dampi "In the manufacture of confectionery of certain kinds, pellets of candy are i' obtain a certain desirable finish and appearance." These traysarc suspended from two lateral points, and the agitation is performed by an attendant, who pushes and jerks the trayvin a peculiar manner. This operation is laborious, and requires a considerable degree-of skill in the operation before it can be performed properly. The bulky andheavy character of coaliequiresthat it be 'thrown against a riddle standing at an angle with the ground,V in'order tol screen it properly and with the least labor. In the manufacturing arts there are many cases where a certain `jolting agitation vis requisite, and in these, and those above cited, my invention will be rfound applicable and advantageous. i

In the accompanying plate of drawin the principle of my invention, operationyand which will illu motion.

The general frameA is supported by legs B. Uprights from the said frame A support the cross-beams D, from which the screen-frame e is suspended by four pairs of chains e, lettered Z1 and a, as shown. For the chains there may be substituted lines or cords, it being only required that the samebe of a flexible character, as will be shown. rEhe sieve or wire netting is shown at E.

The frame A and beam arc more expedients, and form no part of the invention, and may he modified or replaced by other arrangement ofvparts, as occasion demands. The freute e ofthe screen is suspendedby four pairs of chains, as above stated, vthere being one pair at or near nach corner thereof, as shown. 'lhesc chains are affixed to the beam I), each Vpair depending from or near the Vsaine point, as `shown. The two chains of cach pair diverge at an angle, as shown, and this divergence is the feature which conducesto the peculiar jolting agitation ofthe frame e, to which the chains are attached, when. thc vsaid frumc'is moved quickly to and fro, as will be more fully set forth. i `When the frame is moved in one direction, as in the direction of the obvious incline of the s'crecinas shown, its weight will bc sustained by all ofthe chainsuntihitpasses a certain point in its travel, when the hindmost chains of each pair will become slack by the ,acutcness vof the angle formed bythe forward chains and the plaire of the frame e, which anglethe hind most chains subtcvnd when both chains of each pair arcistraight; but when theframc is moved, the angle between the forward chains and the plane of the framebccomes more acute,land thus relieves the hindmost chains from supporting the frame. This transmission of the weight of the frame to the forward chains is attended with a' jerk or jolt of the frame when the motion ofthe latter is brisk. When the' frame is returned, or drawn in the contrary direction, the hindmost chains (new the forward chains) tighten as the angle aforesaid becomes more obtuse, and when the movement of the frame is brisk, the said chains become straight, and take the weight of the frame e with a jerk, which is peculiarly desirable for screening, sifting, or other purposes, as aforesaid.

`In lig. l the frame is being moved upward, or against the obvious incline. 'lhc forward chains b having become straight, take'the weight ofthe frame. The hindmost chains are then slack, as shown. In the reverse motion the rcd chains exhibit the operation, the chains if having become slack, i 'taken the weight ofthe frame, as shown at u.

Goupled with the intermittent jerking orjolting ofthe frame, as above described, the said frame is accorded provided with my improvements.

ting motion applicable to a variety of quently becomes clogged or choked, and to jolted or agitated in trays, to

gs asalt-riddle or screen is shown` suspended by chains according to and which will now be specifically,described, both as to its construction and strate the application of my improvid device for obtaining the desired agitating as shown` at Z1 and the chains a havin an up-and-down or vertical motion, (keeping parallel to itself at each point' of the said vertical motion,) which, in concert with its ordinary to-and-fro motion, (given by the power applied to g,) conduces to va compound agitating motion, which is peculiarly eiiicient in such operations as sifting, screening, or abrading pellets or particles -of maf-ter, or accomplishing the comnlingling of materials or compounds.

vModifications of my invention may be made in several Ways, the prinniple, however, being the same, son-1e of which I will describe. Y c 4 In the place of suspending the frame e by chains or flexible cords, four pairs of rods, d d', divcrging from points L 7L, may be used-to support the frame from beneath l it, the said rods being each provided with a slotted head, j, to enclose a pinz', on the frame e, as is better shown at` the detail view of lig. 3. The operation of' these rods would be analogous to that of the chains before described, and 'requires no separate description.

Again, the frame e may be made to rock, se to speak, upon the ends of those rolls d d, or the said rods, with the eye and pin-device, or any suitable equivalent thereof', may be substituted above the frame for the flexible chains, the travel of the pins t' in thepeyesj taking the place of theslacked chains.

I have thus se't forth in detail what I consider to be the best means of producing the peculiar ell'ective motion, but in all the equivalent modilcations generally describedthe principle of their action is identical with that first described.

When used for saltscreens, the jerking motion is highly effective to keep the screen from choking, which it is liable to do with damp or even dry salt.

In some instances two pairs of chains orrods attached tothe frame or tray, so as to balanceit, will be quitev suflcient, as in the agitating of confectionery before mentioned, but with heavier or' more bulky matter four pairs will be more suitable.

This invention has been proven by practical trial to operate in themanner above set forth.

I claim as new, and desire to secure by Letters Patentsuspending or supporting a frame, e, or tray, or box, or other vessel by two or more'pairs ot' diverging rods or chains, substantially as shown and described, or the equivalent thereof, for the purpose of producing in the said frame, tray, box, or other vessel the peculiar compound agitating motion, as above set forth. The above specification of my invention signed by me, this 23d day of January, 1868.

SAML THOMPSON.

Witnesses:

Win F. MCNAMARA, ALEX. F. Renners. 

